Volumetric device



Oct. 12, 1943. A.. GLAWON 2,331,549

VOLUMETRIC- DEVI-CE- Filed March 19, 1940 2 Sheets-Sheet 1 Inventor flag/ 4 paw;

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Oct. 12, 1943. A. GLAWON VOLUMETRIC DEVICE Filed March 19, 1940 2 Sheets-Sheet 2 Q fittomeys Patented Oct. 12, 1943 ouiris o STATiZd harem GFFFYPCE r voLUMETaIc DEVICE Adolph Glawon, Staten Island N. Y. Application March -19, 1940, ee-rial No. 324358 4 Claims. (01. 73- 65) The invention relates to improvements in volumetric devices in which a quantity of material is measured; provision being made for the separation of the material so measured into aliquot parts; Acylinder-containing a piston which is afiixed to a-graduated stem provides for the first step mentioned above, while the second step is provided for by a variable stop, working on a graduated segment, which limits the movement of the piston. This device is primarily designed for use in pharmacies in the making of folded powders. These folded powders being a form of medication -in which individual doses are put up in small envelopes or other similar containers.

'Oned'orm of the invention is illustrated in the accompanying drawings in which- Figure 1 is a side elevational view.

Figure2 is a verticalsectional View taken substa'ntiallyon a line 2--2 of Figure 1.

Figure -3 -is a top plan view.

Figure 4 is a horizontal sectional view taken substantially one. line 4-4 -'of Figure 1, and

I Figu-re'5is a perspective view'of the adjustable stop ior the actuating lever.

Referring now to the drawings in detail, wherein for the purpose of illustration I have'disclosed a preferred embodiment of the invention, the numerals l and 2 designate a conventional'form of itwed-ge bracket in which the socket part 2 is secured toa counter, table, or-othersuitable supporting structure designated at A and the wedge plate fl :is secured to a cylinder -30 by means ofa'splitclamp 2 1 forsecu-ring the cylinder in an upright position.

. A piston B-hasa working fit in the cylinder 341 and is provided on its top with a leather disk 6, the underside of the piston having a piston stem 1 extending downwardly therefrom through the bottom of the cylinder. The stem 1 is of square shape in cross section and is conformably fitted in thesquare-shaped bore 3| of a plug 23' secured in thelower endof the cylinder by a set screw 24.

Suitably secured to theupper end of the cylinder is a platform 9 having an opening 8 registering with the open top of the cylinder, one edge of the platform terminating-in a down- War'dly extending trough or spout l8.

A U shaped bracket 22 is secured at its bight portion to the .plug23 by means of a screw 34, the legs of. the'bracket extending downwardly and having a shaft I4 journaled therein to which a pinion .1 3 is-secured engaginga rack '33 formed onone side of the pistonst'em Another side of the .piston-'stem 1 is formed' with 'graduations 1' and with which the loweredge of an indicator i5 cooperates, the indicator being secured "to the bracket '22 by the screws "34.

-Secured on the shaft 14 is a ratchet S-at'one edge of which is a'gravity actuated dog 4 pivoted on the bracket -2"-2 andengaging the teethof the ratchet. g

A pair of spaced parallel arms 'H are also secured on the "shaft t4, the arms being positioned at'opposite sides of the ratchet and projecting radially "therefrom. At the outer ends of the-arms H is apin Iabout which'a'spring 26 is-coiled,'one-end of the spring engaging the upper end of a pawl 3 pivoted on the arms ll for urging the pawl into engagement with the ratchet -5 at an edge thereof opposite from the pawl '4, the other end of the spring 26 "being hooked around'one-of the arms H, as shown to advantage in Figure 40f the drawings.

"Pivotally connected to the pin "I l, is the lower end "of a connecti'ng 'rod 12 extending upwardly insubstantial parallelism "with the cylinder 30 and having its upper end pivoted as at 25 'to a lever II], the inner end of the lever being pivoted as at 19 to a-split clamp 20 secured to the upper portion of thecylinder.

The pivot m'ember" 25- projects through an arcuate slot 32 formed-adjacent one edge of a segment Fl which is also secured to the [clamp 20 by-the pin 19. Graduations ll' arealso formed cn-the segment'ad'jacent the slot 32.

An adjustable stop l6 has oneend also pivoted on the pin 19 and-its-opposite endbent angularly as shown at 36 in the path of the lever f0. The stop [6 is secured in adjusted position on the segment by-means of a set screw 2| projecting through the-slot 32.

The device is fastened to acounter, table, or otherconvenient place by means of the'conventional wedge *and slot fastener, l and '2. The Wedge portion}! "of this fastener is screwed 'to the contracti'ble band 21, which encircles the cylinder -30{ the'slot is screwed to the counter or other place.

-To operate the device, the dogs 3 and 4 are held off the ratchet gear 5, until the leather topped piston B is retracted suflicien'tly to allow the cylinder to contain the powder to be sub;

divided. The retraction of the piston is accomplished either by turning the ratchet gear 'in a counterclockwise direction or by pulling 'down the piston stem 1. The powder is then placed into the cylinder thru theopeningB inthe center of the platform 9. This opening in the platform is the same bore as that 'oi the cylinder. "The flange 28 on the lower side or the platform is internally threaded to fit the threading 29 at the upper end of the cylinder. (It is advisable to tamp the powder after it has been placed into the cylinder to insure uniform dispersion of it.) The level of the powder in the cylinder is then brought up flush with the surface of the platform by working the hand lever I0. This hand lever is connected to the ratchet lever l l, by the connecting rod [2. On raising the hand lever, the dog 3, acted upon by the spring 26, engages the ratchet gear, turning it in a clockwise direction, which in turn actuates the pinion 13, as both these gears are firmly connected to the same axle H.

The pinion meshes with the rack 33 of the piston stem. The ratchet gear is prevented from slipping back by the dog 4, which makes contact with the ratchet gear by gravity. When the level of the powder in the cylinder is flush with the surface of the platform, a spatula or other tool is held over the opening in the platform, and the hand lever is worked until a figure is reached at the piston stem indicator [5, which is divisible without remainder by the number of subdivisions to be made. The set screw 2| is then loosened, and the stop IE, on the piston limiting segment I1, is set at the figure obtained by the above calculation. (The segment just mentioned is screwed to the contractible band 20, which encircles the cylinder.) The set screw is then tightened to secure the stop in place. This set screw passes thru the stop and thru the slot 32 in the segment, being bound on the inner side of the segment by a nut having a rib which rides in the slot, preventing the nut from turning when i the set screw is manipulated. Raising the hand lever fromD on the segment, to the stop, causes the first subdivision to appear above the surface of the platform and it is pushed with a spatula or other tool down the chute [8, into its container. Returning the hand lever to and repeating the above brings up the next subdivision and so on.

The calibrations of the piston stem agree with those of the piston limiting segment in-so-far as one unit on the stem corresponds to one unit on the segment. The piston stem having to measure the amount of powder placed into the cylinder, its scale runs from 0, when the piston is at the platform level, to 320 units, when the piston is completely retracted. This range on the stem scale was found to be satisfactorywhen using a cylinder in which the piston could be retracted sufficiently to allow a inch capacity and having an inside diameter of about 1 inch. From one graduation to the next on the stemis 2 units and at every unit point is a figure to correspond, that is, the figures 20, 40, 60 and so on, up to and including 320 appear on the stem at the proper intervals. The piston limiting segment is calibrated from 0 to 10 which means that from a? to of an inch of powder may be brought above the surface of the platform at one lift of the hand lever, as the drive mechanism is so constructed that the lifting of one tooth of the ratchet gear by the dog 3, which causes a corresponding tooth to be caught by thedog 4, will raise the piston in the cylinder 5 2- of an inch. 7 The amount of powder brought above the surface of theplatform depends, of course, on the setting of the stop, which governs the sweep of the hand lever.

The stop and the hand lever pivot on the same pinlB. The stop is sofconstructed as to present to the hand lever a fiat surface 36, for about inch of its length, at which point contact for the stopping of the hand lever is made. The pin 25, which holds the connecting rod to the hand lever, passes thru the slot in the segment and is bound by a nut on the inner side of the segment. The connecting rod and the hand lever are thus held close to the surface of the segment, enough play being allowed for the hand lever and the connecting rod to move freely across it.

The plug 23, at the upper end of the drive mechanism, fits snugly into the lower end of the cylinder for a distance of about inch, being held in place by the set screw 24. The piston stem moves snugly thru the squared opening 3|, in the plug just mentioned, the piston stem is thus held firmly in contact with the pinion.

The fork 22 of the drive mechanism is held to the plug 23 by a screw 34. The screw 34 also holds the piston stein indicator in place.

I claim:

1. A device of the character described comprisinga cylinder, means carried by the cylinder for mounting the device upon a suitable support, a piston working in the cylinder and having a stem projecting from the lower end of the cylinder, graduations upon one side of the piston stem, rack teeth formed on the piston stem, a bracket secured to the bottom of the cylinder, an axle journaied in said bracket, a ratchet gear and pinion fixedly mounted on said axle with the teeth of the pinion in mesh with the rack teeth, a graduated segment attached to the cylinder adjacent the upper end thereof, an adjustable stop member carried by the segment and adapted to be clamped to said segment at a desired point adjacent the graduation thereon, a hand lever. pivoted on the segment to move over the graduations thereon, a ratchet lever pivoted at one end on the bracket, means connecting the hand lever and the other end of the ratchet lever, and a spring-pressed dog carried by the ratchet lever, the said dog cooperating with the teeth of the ratchet gear when the hand lever is raised to raise the piston until the hand lever strikes the said stop, the said dog being inoperative to actuate the ratchet gear when the hand lever is lowered. I

A device of the character described comprising a cylinder, means carried by the cylinder for mounting the device upon a suitable support, a plug fitted into the lower end of the cylinder, said plug having a square opening therein, a piston stem of square cross-section extending through the opening in the plug, graduations upon one side of the piston stem, rack teeth formed in the side of the piston stem opposite the graduations, a piston disposed within the cylinder and attached to the upper end of the piston stem, a forked member fastened to the said plug exteriorly of the cylinder, an axle journaled in said forked member, a ratchet gear and a pinion fixedly mounted on said axle with the teeth of the pinion in mesh with the rack teeth, a graduated segment attached to the cylinder adjacent the upper end thereof, an adjustable stop member carried by the segment and adapted to be clamped to said segment at a desired point adjacent the graduations thereon, a hand lever pivoted on the segment to move over the graduations thereon, a ratchet lever pivoted at one end on the fork, a connecting rod connecting the hand' lever and the other end of the ratchet lever, and a spring-pressed dog carried by the ratchet lever and actuating the ratchet gear when the hand lever is raised to raise the piston until the hand lever strikes the said stop, the said dog being inoperative to actuate the ratchet gear when the hand lever is lowered.

3. A measuring dispenser of the class described comprising a cylinder, means for supporting the same in an upright position, a piston working in the cylinder and having a stem extending downwardly therefrom, means at the lower end of the cylinder operatively engaging the stem for actuating the piston, a segment secured directly to the wall of the cylinder, said segment having graduations thereon, a manually operable lever carried by the segment and operatively connected to the last-named means, and an adjustable stop carried by the segment adjacent 15 the graduations thereon and disposed in the path of movement of the lever to vary the throw of the lever.

4. A measuring dispenser of the class described comprising a cylinder, means for supporting the same in an upright position, a piston working in the cylinder and having a stem extending downwardly therefrom, means at the lower end ADOLPH GLAWON. 

